I don't know, I'm pretty sure it is a GSM phone, which some companies will take,..I tried to switch it to Straight Talk and because it is not GSM I was not able to
As I understand it, it is a GSM phone as compared to a CDMS phone, it depends if they will accept another phone and if they require it to be one of the above. I tried them for Straight Talk and they were not compatible as they needed to be the CDMS or CDSM whatever it is, so they are GSM